1 files changed, 2 insertions, 3 deletions
diff --git a/sphinx/themes/basic/static/doctools.js b/sphinx/themes/basic/static/doctools.js
index 344db17dd..b33f87fcb 100644
--- a/sphinx/themes/basic/static/doctools.js
+++ b/sphinx/themes/basic/static/doctools.js
@@ -87,14 +87,13 @@ jQuery.fn.highlightText = function(text, className) {
           node.nextSibling));
         node.nodeValue = val.substr(0, pos);
         if (isInSVG) {
-          var bbox = span.getBBox();
           var rect = document.createElementNS("http://www.w3.org/2000/svg", "rect");
-       	  rect.x.baseVal.value = bbox.x;
+          var bbox = node.parentElement.getBBox();
+          rect.x.baseVal.value = bbox.x;
           rect.y.baseVal.value = bbox.y;
           rect.width.baseVal.value = bbox.width;
           rect.height.baseVal.value = bbox.height;
           rect.setAttribute('class', className);
-          var parentOfText = node.parentNode.parentNode;
           addItems.push({
               "parent": node.parentNode,
               "target": rect});